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39 results about "Bright star" patented technology
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Automatic telescope
An automatic telescope (10) capable of determining an orientation without requiring input from a user or any external source. The telescope (10) preferably includes a database (22) to store astronomical information, a processor (24) to control a drive mechanism (18), a vision device (30) to sense bright stars, and a motion sensor (32) to generate a motion signal. When the vision device (30) is slewed from alignment with a first bright star to a second bright star, the motion signal is preferably representative of a measured angle between the first and second bright stars. This process is preferably repeated for several bright stars to generate several measured angles. The processor (24) can then use the measured angles to identify the bright stars and determine the orientation of the telescope (10).
Owner:BUSHNELL
System and method for varying exposure time for different parts of a field of view while acquiring an image
ActiveUS7158180B2High resolutionTelevision system detailsColor television detailsSpatial light modulatorDigital micro mirror device
A system and method for exposing different parts of a single field of view for various and differing lengths of time while capturing an image is provided. For astrophotography, unwanted light pollution or over-saturation bleeding from nearby or obtrusive stars may be greatly reduced or eliminated while still capturing the image of the nearby brighter star in the same field of view. Also, a system and method for real-time contrast control while capturing an image to optimize signal-to-noise ratio for various parts of the captured image, is provided. An embodiment of the present invention provides such techniques by using spatial light modulator devices, such as a digital micro-mirror device, to controllably mask different portions of light from an image that expose film or a charge-coupled device. A system and method for a way to use a spatial light modulator device as an active and controllable mask for photolithography, is provided.
Owner:TEXAS INSTR INC
Star pattern recognition method based on directed loop
InactiveCN103148852AGuaranteed recognition success rateNavigation by astronomical meansPattern recognitionStar pattern
The invention provides a star pattern recognition method based on a directed loop. In the method, a brightest star in a field of view is selected as a reference star, the reference star and neighboring stars are connected to form a radial star pattern, a candidate reference star matching group is obtained through a matching probability method, then, the neighboring stars are used for forming a directed loop model, and based on the principle of integral matching and a longest matching chain, an optimal matching group is selected as a final recognition result. In comparison with the prior art, the method has the advantages of high success rate of star pattern recognition, high recognition speed, and so on. The star pattern recognition method provided by the invention can guarantee that the star pattern recognition success rate reaches 99% and the recognition speed reaches 5-10 HZ when the position error of stellar image points is superior to a 0.1 pixel.
Owner:自然资源部国土卫星遥感应用中心
Star sensor with target detecting function
InactiveCN104034331AEasy to captureMeet the conditions of useNavigation by astronomical meansStatic random-access memoryBright spot
The invention discloses a star sensor with a target detecting function. The star sensor comprises an image acquisition unit and an image data processing unit, wherein the image acquisition unit comprises an optical lens with a large field of view and a small aperture, an image sensor LUPA4000, an ADC (analogue-to-digital converter) chip, a static random access memory, an FPGA (field programmable gate array) drive unit and a network access module unit, and the image data processing unit is a DSP (digital signal processor) board. According to a design idea of the large field of view and the small aperture, star map matching only requires bright stars of over level three, so that the star sensor is provided with a navigation star database smaller than that of a traditional star sensor, has the advantages of small size and light weight, and has a star-sensitive measurement function and a space target detection function.
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
Method for automatically aligning telescope
A manual controller commands a telescope mount to automatically track a specific bright star after the image of the star is located to center of an electronic eyepiece and a timer is started. The average moving speed of the bright star is calculated after a predetermined elapsed time to acquire the right ascension (RA) and the declination (DEC) coordinates of this bright star. Subsequently, the RA and DEC coordinates are compared with pre-stored data contained within a database used to identify the bright star. The celestial sphere coordinates of the telescope can be determined after a minimum of one bright star is identified. In the auto-tracking procedure, the manual controller controls movement of telescope by feedbacks of the drifting speed and direction of the specific bright star in an electronic eyepiece for the purpose of keeping the specific bright star in the center of the electronic eyepiece.
Owner:NANTONG SCHMIDT OPTO ELECTRICAL TECH CO LTD
Automatic telescope
Owner:BUSHNELL
Construction method of star database of triangle matching-type star sensor
ActiveCN107883946AReduce false recognition rateGuaranteed recognition effectNavigation by astronomical meansHelical lineFixed stars
A construction method of a star database of a triangle matching-type star sensor includes steps of: S1) determining basic cut-off magnitude and candidate cut-off magnitude; S2) rejecting peculiar stars; S3) performing fixed star proper motion compensation algorithm; S4) determining threshold of angular distances of neighboring fixed stars; S5) performing whole-celestial sphere helical line traversal; S6) determining relative bright stars; and S7) generating database of angular distances between stars.
Owner:BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH +1
System and Method for Varying Exposure Time for Different Parts of a Field of View While Acquiring an Image
ActiveUS20070216794A1High resolutionTelevision system detailsColor television detailsDigital micro mirror deviceSpatial light modulator
A system and method for exposing different parts of a single field of view for various and differing lengths of time while capturing an image is provided. For astrophotography, unwanted light pollution or over-saturation bleeding from nearby or obtrusive stars may be greatly reduced or eliminated while still capturing the image of the nearby brighter star in the same field of view. Also, a system and method for real-time contrast control while capturing an image to optimize signal-to-noise ratio for various parts of the captured image, is provided. An embodiment of the present invention provides such techniques by using spatial light modulator devices, such as a digital micro-mirror device, to controllably mask different portions of light from an image that expose film or a charge-coupled device. A system and method for a way to use a spatial light modulator device as an active and controllable mask for photolithography, is provided.
Owner:TEXAS INSTR INC
Morphology-based robot star point segmentation method and FPGA realization method
InactiveCN105046713ASuppress interferenceAccurate segmentationImage enhancementImage analysisProduction lineFpga implementations
The invention discloses a morphology-based robot star point segmentation method and an FPGA realization method. The method comprises the following steps: utilizing the characteristic keeping dim targets of edge structure elements and the characteristic of suppressing noise through opening operation; defining a new star point segmenting method according to the features of star points and the features of different interferences; carrying out opening operation and novel closing operation on images by using three different structure elements; subtracting the relatively low value of the two operation results by using the novel closing operation; and extracting the star points in an artwork master corresponding to the pixel coordinate where the subtraction result is greater than zero to realize the complete segmentation of the star points. According to the morphology-based robot star point segmentation method and the FPGA realization method, the different types of interferences of the star map can be suppressed and the star points can be extracted, and the correct segmentation of the bright stars and faint stars can be realized so as to improve the centroid precision; and by taking full advantage of FPGA in parallel production line operation system architecture design and by adopting the parallel production line operation system architecture to organize an operation module in a star point segmentation algorithm, the operation speed is greatly improved and the time required by the system processing is shortened.
Owner:BEIHANG UNIV
Automatic faint star recognition method based on perimeter features
ActiveCN106123891ARapid positioningQuick identificationNavigation by astronomical meansStar catalogueHash function
The invention relates to an automatic faint star recognition method based on perimeter features. The method comprises the following steps that 1, a navigation star catalogue is constructed by adopting a magnitude threshold method according to a fundamental star catalogue, a whole celestial sphere is divided into a plurality of partial overlapped celestial areas by adopting an overlapping ball moment method, two brightest stars in each overlapped celestial area are found to serve as a main star pair, other stars construct a triangular perimeter feature library by serving as auxiliary stars, hash functions are constructed for the generated feature library according to the perimeter size, and fragmentation is conducted; 2, the navigation star catalogue and a navigation feature library are read, star atlas extracting results are sorted in a descending order according to the gray value size, the two brightest stars in each celestial area are taken as the main star pair, the other stars are taken as the auxiliary stars, an observation triangle taking each main star pair as a common side is constructed, and the perimeter of the triangles and the length of the two sides of each triangle taking the corresponding main star pair as the common side are calculated. According to the method, the number of the feature triangles is greatly decreased, and compared with a traditional triangle recognition algorithm based on an angular distance between the stars, the angular distance comparison frequency is decreased, and the recognition speed is increased.
Owner:UNIT 63680 OF PLA
Image processing apparatus capable of properly emphasizing differences in brightness between bright spots, image processing method, and storage medium
ActiveUS20160117803A1Difference in brightnessImage enhancementTelevision system detailsImaging processingSky
A technique that makes it possible to obtain a natural photographed image which does not give a feeling of strangeness and emphasizes differences in brightness between bright stars and low-brightness stars, without depending on a photographic scene. In a case where photographing the starry sky, the number of bright spots is detected from a picked-up image, and image processing performed on the picked-up image is controlled to at least blurring processing or edge emphasis processing or neither the blurring processing nor the edge emphasis processing, according to the number of detected bright spots.
Owner:CANON KK
Method for automatically aligning telescope
A manual controller commands a telescope mount to automatically track a specific bright star after the image of the star is located to center of an electronic eyepiece and a timer is started. The average moving speed of the bright star is calculated after a predetermined elapsed time to acquire the right ascension (RA) and the declination (DEC) coordinates of this bright star. Subsequently, the RA and DEC coordinates are compared with pre-stored data contained within a database used to identify the bright star. The celestial sphere coordinates of the telescope can be determined after a minimum of one bright star is identified. In the auto-tracking procedure, the manual controller controls movement of telescope by feedbacks of the drifting speed and direction of the specific bright star in an electronic eyepiece for the purpose of keeping the specific bright star in the center of the electronic eyepiece.
Owner:NANTONG SCHMIDT OPTO ELECTRICAL TECH CO LTD
Method for selecting observation triangle before star map matching
InactiveCN103968833ASpeed up the pose output speedImprove the probability of a successful match and pose outputNavigational calculation instrumentsNavigation by astronomical meansCelestial sphereComputer science
The invention relates to a method for selecting an observation triangle before star map matching. The method comprises the following steps: primarily selecting the observation triangle; performing second optimization screening on the observation triangle, wherein the screening conditions are that the minimum edge for forming the observation triangle on an image surface has more than dmin pixels, and the minimum included angle in the observation triangle on the image surface is larger than thetamin. Compared with the conventional method, the method for selecting the observation triangle before the star map matching can improve the 60.8% probability of one-time matching success and posture output, can preferentially select three groups of observation triangles consisting of brighter stars to recognize and verify in the practical engineering, namely having 77.5% probability to improve success rate of three times of matching and posturing, and greatly improves the time consistency of every frame of all day sphere posturing output.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
Star sensor navigation star catalogue screening method
ActiveCN108645399AImprove distribution uniformityAvoid localized denseNavigation by astronomical meansFixed starsStar catalogue
A star sensor navigation star catalogue screening method comprises the following steps: eliminating navigation stars with the star magnitudes being larger than that of a star sensor limit detection star and navigation stars with the fixed star attribute tags being binary stars or variable stars from a star catalogue, screening alternative navigational stars from the star catalogue from small to large according to the size of the star magnitude and a reference angular distance, and screening secondary alternative navigation stars according to the angular distance between the alternate navigation stars and a target navigation star to obtain a navigation star catalogue. Bright stars with a high signal-to-noise ratio are preferably selected, and the problems of complicated screening process, many redundant navigation stars and uneven distribution of the star catalogue in existing star catalogue screening processes are solved.
Owner:BEIJING INST OF CONTROL ENG
Black-snake beautifying oral liquid
ActiveCN101972423APromote and improve microcirculationDischarge in timePharmaceutical delivery mechanismReptile material medical ingredientsCannabisSemen
The invention discloses black-snake beautifying oral liquid which is prepared from the slaughtered and eviscerated fresh zaocys dhumnades and traditional Chinese medicines such as reed rhizome, flavescent sophora root, figwort, honeysuckle flower, fructus cannabis, semen pruni, tetrandra root, hawthorn, pilose asiabell root, astragalus root, eucommia bark, angelica, wolferry fruit, crystal sugar and water. The black-snake beautifying oral liquid contains high protein, rich polypeptide and mineral elements for supplying essential nutrition for human body so as to promote and improve microcirculation, regulate gastrointestinal function, discharge toxin in human body timely and enhance immunity of human body. The black-snake beautifying oral liquid has functions of refreshing, keeping red lips and white teeth as well as graceful carriage, improving eyesight like bright star, strengthening voice and body, blackening hair and removing freckles, avoiding constipation and cold, promoting growth and development of teenagers, postponing epiphysial closure and prolonging growth cycle.
Owner:何龙
Star map recognition method, star map recognition apparatus and star map recognition system based on triangle matching
ActiveCN107907126AAvoid the effects of pseudo-starsReduce redundant matchingNavigational calculation instrumentsNavigation by astronomical meansAlgorithmStar number
The invention relates to a star map recognition method, a star map recognition apparatus and a star map recognition system based on triangle matching. According to the present invention, part of starpoints are selected from bright stars, and are recognized, and re-selection is performed if the recognition fails, such that the interference caused by pseudo stars in the star map can be eliminated;the matching is performed with the multiple star points, such that the redundant matching probability can be substantially reduced in the case of the high error margin; the traditional absolute errorthreshold is changed into the relative error threshold, such that the small angular distance is corresponding to the small error margin so as to increase the calculation speed; and the primary recognition on the star points is completed by comparing the star number, and the primary recognition result is verified by comparing the theoretical angular distance value calculated with right ascension and declination to the actual measurement value, such that the number of the searching of the star number according to the angular distance and the number of the star number comparing are reduced, and the total recognition speed is improved.
Owner:BEIJING AEROSPACE INST OF THE LONG MARCH VEHICLE +1
Bright star coordinate difference matching method
ActiveCN110926456AOvercome deficienciesCalculation speedNavigational calculation instrumentsNavigation by astronomical meansFixed starsStar catalogue
Owner:西安航光仪器厂
Glazed tile with bright star effect on surface and preparation method of glazed tile
The invention relates to the technical field of ceramic tiles, and particularly discloses a glazed tile with a bright star effect on the surface and a preparation method of the glazed tile. The preparation method comprises the steps of applying ground glaze on a green brick, applying matte glaze, printing, applying bright star glaze and sintering; by adjusting the components and content of the matte glaze, the matte glaze forms a large number of glass phases, which is beneficial for forming a compact matte glaze layer; the high-sodium-content bright star glaze can remarkably reduce the melting temperature, the surface tension and the high-temperature viscosity of the bright star glaze, is matched with the matte glaze to enable the bright star glaze to be leveled in a matte glaze layer, is high in density, facilitates improvement of the antifouling property of the bright star glaze layer, and is low in cost and easy to popularize. The glaze surface of the fired glazed tile has the effect of sparkling star light, the flatness of the glaze surface is high, the glaze surface does not need to be polished, and the process is simple.
Owner:GUANGDONG NEWPEARL CERAMIC GRP CO LTD +4
Multifunctional firework bright star granulation safety material preparing mechanism
InactiveCN106560463AGuaranteed stabilityImprove stabilityUsing liquid separation agentExplosive working-up apparatusFireworksEngineering
The present invention discloses a multifunctional firework bright star granulation safety material preparing mechanism, wherein the material feeding mechanism comprises the transmission, material discharging, agent adding and dust removing system, the granulation feeding mechanism adopts the steel wire rope transmission and the pulley block transmission, the material vehicle uses the two wedge-shaped diversion material hoppers to sub-package the granular material and the powder material, uses the pneumatic butterfly valve as the flow rate control valve, and arranges the material hoppers on the electronic weighing device by using the floating type design, the agent adding and dust removing device respectively suck the additive and the water to the spraying nozzle positions through the water pump in two paths, one spraying nozzle is used for removing dust, and the other spraying nozzle is used for adding the additive. According to the present invention, the man-machine separation purpose is achieved, the safety of the operator is ensured, the control of the process is strengthened, the sealed treatment of the material is ensured and no material is leaked, and the dust removing device is arranged to reduce the generation of spark and static electricity so as to ensure the safety and the efficiency of the production.
Owner:CENT SOUTH UNIV
Triangular star map matching method based on redundant reference star
PendingCN112880666AReduce multiple match issuesIncrease the corresponding angleNavigation by astronomical meansFixed starsStar catalogue
The invention provides a triangular star map matching method based on redundant reference stars. The method comprises the following steps of: constructing a CCD star image library consisting of m1 bright stars in a CCD star image, and selecting three stars to establish a basic triangle meeting a set condition; selecting m <2> reference stars from a star catalogue to construct a reference star library, and establishing a to-be-matched triangle; respectively calculating image distances and included angles of the basic triangle and the to-be-matched triangle, and realizing matching of the basic triangle according to a corresponding image distance difference and a corresponding angle difference; and according to a three-point positioning principle, realizing the matching of a CCD star image with a fixed star in a reference star catalogue on the basis of a corresponding angle relation. According to the method, the problems of non-unique matching and high mismatching rate of a triangle algorithm are solved, the star map recognition matching rate and accuracy are remarkably improved. The method is suitable for star map recognition in the fields of astronomical navigation, astronomical geodesic and the like.
Owner:NAT TIME SERVICE CENT CHINESE ACAD OF SCI
Multi-dimensional advanced vocabulary learning card system
ActiveCN108877343AIncrease interest in learningImprove learning efficiencyElectrical appliancesMulti dimensionalWord meaning
The invention discloses a multi-dimensional advanced vocabulary learning card system. The card system includes a new word library module, a familiar word library module, a word learning module and a resetting module. The word learning module includes a vocal information storage terminal, an algorithm comprehensive evaluation module, a word meaning understanding terminal, a word meaning judgment module, a morphological examination terminal, a morphological judgment module, a bright star module, a first stage card word learning module, a second stage card word learning module, a third stage cardword learning module and a fourth stage card word learning module. The new word library module is in bidirectional communication connection with the word learning module, and the word learning moduleis in bidirectional communication connection with the resetting module. The word learning module is in unidirectional communication connection with the familiar word library module. The system continuously unlocks new modules in the learning process of a learner, so that the learner enjoys the fun of upgrading in the learning process, thereby improving the learner's interest in learning, and alsoimproving the learning efficiency of learners' English words.
Owner:山东声时代教育科技有限公司
A precise north-seeking method to the north star for a vehicle-mounted measurement and control device
InactiveCN106382924ASave manpower and material resourcesEasy to measureCompassesMaterial resourcesNight sky
The invention relates to the field of measurement by vehicle-mounted measurement and control devices, and particularly relates to a precise north-seeking method to the north star for a vehicle-mounted measurement and control device. The method is an orientation zero degree comprehensive calibration method suitable for a situation that no reference azimuth mark or other fixed station exists round a vehicle-mounted measurement and control device station. By utilizing a characteristic that the north star is near the north pole, is a second-brightest star and is bright in the night sky, by correcting a light ray refraction error and by utilizing a circle solving formula, the orientation zero offset of a local antenna of the vehicle-mounted measurement and control device is acquired. By adopting the scheme mentioned above, arrangement of marks at fixed points around the device station is not needed, thus reducing manpower and material resources. The method is simple, convenient and reliable in measurement, facilitates equipment transferring, increases measurement precision, is suitable for the situation that no reference azimuth mark or other fixed station exists round the vehicle-mounted measurement and control device station, and has a wide application prospect.
Owner:李立三
Black-snake beautifying oral liquid
ActiveCN101972423BPromote and improve microcirculationDischarge in timePharmaceutical delivery mechanismReptile material medical ingredientsCannabisCrataegus pinnatifida
Owner:何龙
Image processing apparatus capable of properly emphasizing differences in brightness between bright spots, image processing method, and storage medium
ActiveUS9591231B2Difference in brightnessTelevision system detailsImage enhancementSkyImaging processing
A technique that makes it possible to obtain a natural photographed image which does not give a feeling of strangeness and emphasizes differences in brightness between bright stars and low-brightness stars, without depending on a photographic scene. In a case where photographing the starry sky, the number of bright spots is detected from a picked-up image, and image processing performed on the picked-up image is controlled to at least blurring processing or edge emphasis processing or neither the blurring processing nor the edge emphasis processing, according to the number of detected bright spots.
Owner:CANON KK
A Space Debris Detection Method Based on Inertial Space
ActiveCN113295147BImprove detection success rateRealize detectionPicture interpretationICT adaptationThree-dimensional spaceComputational physics
Owner:ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
A method for constructing star library of triangle matching star sensor
ActiveCN107883946BReduce false recognition rateGuaranteed recognition effectNavigation by astronomical meansFixed starsAngular distance
A construction method of a star database of a triangle matching-type star sensor includes steps of: S1) determining basic cut-off magnitude and candidate cut-off magnitude; S2) rejecting peculiar stars; S3) performing fixed star proper motion compensation algorithm; S4) determining threshold of angular distances of neighboring fixed stars; S5) performing whole-celestial sphere helical line traversal; S6) determining relative bright stars; and S7) generating database of angular distances between stars.
Owner:BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH +1
Release agent for melamine impregnated paper and preparation method thereof
ActiveCN107119492BSticky is not easyImprove liquidityNon-fibrous pulp additionPaper coatingAlcoholPhosphate
The invention discloses an anti-sticking agent for melamine impregnated paper and a preparation method thereof. The anti-sticking agent for the melamine impregnated paper is prepared from the following components in parts by mass: 5 to 10 parts of diethylene glycol, 3 to 5 parts of a sodium hydroxide saturated solution, 8 to 12 parts of octanol polyoxyethylene ether, 6 to 10 parts of polyether, 10 to 15 parts of alkylphenol polyoxyethylene ether, 10 to 15 parts of isooctanol phosphate, 3 to 5 parts of alcohol ester, 0.3 to 0.5 part of a defoaming agent and 40 to 60 parts of water. By using anti-sticking agent disclosed by the invention in the melamine impregnated paper, not only can the melamine impregnated paper be difficult to stick and the storage period of the melamine impregnated paper be prolonged, but also the fluidity of paper glue on the melamine impregnated paper is increased, and the phenomena of bright stars and sand holes appearing during a pressing and sticking process are improved.
Owner:CHANGZHOU JIASHIJIA DECORATIVE NEW MATERIAL
Accurate north-finding method for Polaris by vehicle-mounted measurement and control equipment
InactiveCN106382924BSave manpower and material resourcesEasy to measureCompassesOn boardMaterial resources
Owner:李立三
A multi-functional firework bright bead granulation safety batching mechanism
InactiveCN106560463BGuaranteed stabilityImprove stabilityUsing liquid separation agentExplosive working-up apparatusAdditive ingredientFireworks
Owner:CENT SOUTH UNIV
An iterative traversal-based star sensor anti-stray light star point extraction method and device
ActiveCN113532446BReduce extraction impactHigh extraction rateInstruments for comonautical navigationSkyComputational physics
Owner:BEIJING INST OF CONTROL ENG
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